Preparation of TiO2/ZnO co-modified polypropylene fiber and its UV resistance
Surface modification of polypropylene(PP)fiber is carried out with a composite system of TiO2 and ZnO nanoparticles to improve their UV aging resistance.The UV absorption performance and particle size of sol systems with different TiO2/ZnO ratios are compared,the most suitable ratio system is selected,and the UV aging resistance of nano TiO2/ZnO modified fibers before and after UV irradiation is explored.The results show that the composite system of TiO2/ZnO nanoparticles are successfully coated on the surface of PP fibers,forming a complete and uniform alloy film structure.When the Ti:Zn molar ratio is 1:3,after 60 h of continuous UV irradiation,the strength loss rate of PP fibers decrease from 35.9％to 11.3％,indicating a significant improvement in UV aging resistance.
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